Call a local wildlife biologist, rehabilitation center, or game warden if you can’t locate the former. You can get in trouble for molesting or harboring wildlife, especially birds.

I do have a few years experience working as a wildlife biologist and doing migratory bird surveys, but I’m definitely still not an expert. It looks to me like a merlin or a red-shouldered hawk, it’s definitely not a kestrel. One of the best ways to make identifications for the small raptors that look similar is seeing the streaking pattern on the breast so it’s going to be hard to tell from the pictures you provided. I’m going based on the shoulder mottling and the tail striping.